browserName=navigator.appName; 
browserVer=parseInt(navigator.appVersion);

  if (navigator.platform=="MacPPC" && browserName == "Microsoft Internet Explorer") {
  window.location="http://www.projectwebhealth.org/upgrade.html";
} 
	else if (browserName="Netscape Navigator" && browserVer < 4)
	  window.location="http://www.projectwebhealth.org/upgrade.html";
	{
}